Tuck-marker for sewing-machines



(No Model.)

A. JOHNSTON.

TUGK MARKER FOR SEWING MACHINES. No. 248,473. Patented Oct. 18,1881;

6.6. llWaw/ N. PETERS. Phnwuma hm, Washingicn. 04 c.

FNITED STATES PATENT anion.

ALLEN JOHNSTON, OF OTIUMWA, IOWA.

TUCK-MARKER FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 248,473, dated October 18, 1881. Application filed December '7, 1880. (No model.)

To all whom tt may concern:

Be it known that I, ALLEN JOHNSTON, of

Ottumwa, NVapello county, Iowa, have invented a new and useful Improvement in Tuck- Marking Attachments for Sewing-Machines, which improvement is fully set forth in the following specification.

This invention relates to that class of attachments in which the marking is effected by means of a creasing device, usually a wheel acting in connection with a suitable creasingedge and having a reciprocating movement imparted to it lengthwise of said edge.

A description of the construction and operation of attachments of this kind heretofore made or used need not be given, as it is not necessaryto the understanding of thisimprovement. Reference may, however, be had to Letters Patent granted to me November 21, 1876, No. 184,472.

The present invention consists, first, in the combination, with the creasing-edge and creasing device and vibratory arm, of a link for communicatin g motion from the vibratory arm to the creasing device lengthwise of the creasingedge, and an independent spring in contradistinction to a spring formed by the elasticity of the arm for returning the parts to their position; secondly, in arranging the independent spring to act against thelower end of the link, thirdly, in the adaptation to the purposejust namedot'a spiral spring incased in the piece or extension of the frame, which serves to guide the creasing device; and, lastly, in the general combination and arrangement of the parts named.

The following description, in connection with the accompanying drawings, which form a part of this specification, will enable those skilled in the art to which this invention appertains to make and use the same.

A tuck-marking attachment embodying the invention is shown in the drawings, Figure 1 being a perspective view, and Fig. 2 a view in vertical section, through the middle of the vibratory arm, lengthwise thereof, and partly in elevation.

In Fig. 2 the creasing device and creasingedge are shown in elevation; but the bed-plate and other parts to the rightin Fig. 1 are not represented.

The frame of the attachment may be of any ordinary or suitable construction. As shown, it is constructed in the same manner as in my before-mentioned patent, and is composed of the bed-plate a, adapted to be adjustably secured to the bed or cloth plate of a sewingmachine, a plate, 1), adjnstably secured to the bed-plate, and carrying at its outer end the creasing-edge b, and a flexible plate, 0, attached at one end to the plate b, and carrying at its free end the movable creasing device and means for operating the same. In the drawings is also shown a tucker-arm, d, fastened in the usual manner to the plate I), for communicating motion from the needle-bar to the vibratory marking-arm, it being preferred to operate the latter by this means.

The vibratory or marking arm 6 is supported upon the flexible plate 0, and to it, at or near the outer or free end, isjointed the linkf, which carries at its lower end the creasing device, (shown as a wheel, g, supported by a pin, h, so as to turn freely.) A device which does not re: volve could be used, if desired.

The means for supporting the vibratory arm consists of an upright or small bracket, 6, to

which the arm 6 is hinged orjointed by a pivot,

0 The creasing device is guided in its backward-and-forward movement by means of a piece, 2, which is fastened to the flexible plate 0, directly or through the upright e, and a portion, i, of which passes over the pin it and between the forked extremity of the link f. The course of the creasing device is limited by portions of the guide-piece, which extend across the path of pin it and act as stops. The most convenient way of arranging these devices is to form a slot in the piece 6 and have the pin h work therein, as represented.

Within the guide-piece vi, made hollow for this purpose, is placed a spiral spring, it, one endof which bears againstaproj ection or shoulder on the interior of the guide-piece, and the other against the pin h, so as to normally retain the creasing device at the outer end of its course and the vibratory arm in an elevated position, and to be compressed when the said arm is forced down by the action of the needlebar of the sewing-machine.

The operation of the attachment will be readily understood. The needle-bar, in its descent, carries down the tucker-arm, which, in turn,

strikes the vibratory arm 0 and forces it downward. Motion is communicated by means of the link f to the creasing device g, which is pressed upon and rolled lengthwise of the creasing-edge, marking or creasing the goods between them. The guide-piece i, and also the vibratory arm, with the link and creasing device, being supported at the end of the plate 0, the creasing device is held against the creasing-edge with yielding pressure. On the ascent of the needle-bar the vibratory arm is released, and the spring, being allowed to act, forces the creasing device outward and raises the vibratory arm to its first position. Considerable advantage in the matter of durability is obtained by pivoting the vibratory arm and combining it with the independent spring, as there is not the same danger of breaking which attends the use of an arm made of elastic metal and bent so that, when released by the action of the needle-bar, it is raised by its own elasticity and returns the creasing device to its normal position.

Having now fully described the said invention and the manner of carrying the same into effect, what I claim is-- 1. The combination of the creasing-edge, pivoted vibratory arm, and independent spring with the creasing device and connecting-link, arranged to move said creasing device lengthwise of the creasing-edge, substantially as described.

2. The combination, with a vibratory arm, creasing device, and connectinglink, of an independent spring arranged to act against said link, substantially as described.

3. The combination, with a vibratory arm, creasing device, and connection, of a hollow guide-piece and a spiral spring incased in said piece and arranged to operate substantially as described.

4. The combination of the flexible plate and the pivoted vibratory arm,creasing device, connecting-link, guide-piece, and spiral spring, all carried by said flexible plate, substantially as described.

In testimony \vhereofIhave signed this specification in the presence of two subscribing witnesses.

ALLEN JOHNSTON.

Witnesses:

J. T. HACKVORTH, W. '1. MAJOR. 

